Typically, you are not allowed to bring large quantities of liquids through the TSA security checkpoint in your carry-on luggage. Can you bring unopened water through tsa? The TSA follows the 3-1-1 rule, which means that liquids, gels, and aerosols in containers must be in travel-sized containers of 3.4 ounces (100 milliliters) or less. These containers must be placed in a single, quart-sized, clear plastic bag, with one bag per passenger. Each passenger is allowed only one such bag. If you have an unopened water bottle that exceeds 3.4 ounces (100 milliliters), it is generally not allowed in your carry-on bag through the security checkpoint.
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